FITMENT
- 2020-2023 6.6L Silverado & Sierra Duramax L5P 2500HD 3500HD Diesel engine trucks.
- Note: Will NOT fit Cab & Chassis commercial-style trucks.
DESCRIPTION
Product Overview
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Restricted turbo spool, excessive exhaust backpressure, and ongoing intake contamination severely compromise the performance and long-term durability of L5P Duramax trucks. The crushed factory downpipe and DPF trap extreme heat under the hood, triggering constant regen cycles, while the stock EGR system chokes the intake manifold with dirty carbon buildup and introduces catastrophic coolant leak risks. Additionally, disconnected factory wiring plugs remain vulnerable to moisture and road grime after an exhaust upgrade.
- This complete L5P Airflow & Protection Upgrade Package eliminates factory breathing restrictions while safeguarding your truck's vital electronics. Combining a high-flow turbo downpipe, complete EGR removal hardware, and heavy-duty plug-and-play harness caps, it restores crisp turbo spool, stops manifold contamination at the source, and delivers a clean, reliable, and high-efficiency diesel setup.
Key Features
- Relieves backpressure right at the turbine outlet so the L5P VGT turbocharger spools up quicker and responds with noticeably less lag.
- Takes the factory EGR cooler out of the loop entirely, so abrasive soot can no longer choke the intake valves and internal coolant-loss risks disappear.
- Caps the disconnected factory sensor harnesses with dedicated connector plugs that keep moisture, dust, and corrosion well away from the electrical system.
- Swaps the restrictive exhaust canisters and downpipe crimps for free-flowing pipe, shutting down fuel-draining active regenerations and dropping exhaust gas temperatures.
FAQ
Q: What does this complete Duramax L5P upgrade kit come with?
A: The kit comes with a 4" DPF delete pipe, 3.5" turbo downpipe, EGR delete kit, and CAN Bus plugs. It bundles exhaust-flow improvement, intake protection, and electronic-compatibility components into a single complete upgrade.
Q: Why should I upgrade the turbo downpipe and the DPF pipe together?
A: The turbo downpipe improves exhaust flow immediately after the turbocharger, while the 4" DPF pipe improves flow through the remainder of the exhaust. Upgrading both sections at once creates a smoother exhaust path and lowers overall restriction.
Q: Does this kit come with tuning?
A: No. This package includes only the hardware components. Any additional tuning requirements depend on your final vehicle configuration and the components installed.
Q: How does this 4" kit differ from the 5" version?
A: The 4" DPF delete pipe delivers strong flow gains and fits most setups, whereas the 5" version maximizes flow for aggressive tuning and heavy towing. If you want maximum flow and a deeper tone, see the 5" DPF Delete Pipe & 3.5" Downpipe w/ EGR Delete Kit.
